Rotating field magnet for turbogenerators



,19 9- o. T. BLATHY 1,704,589

ROTATING FIELD MAGNET FOR TURBOGENERATORS Filed Jan. 14. 1927 ntents-1dMar. 5, 1939.

so STATES OTTO TITUS BLATHY OF BUDAPEST, HUNGARY.

ROTATING FIELD llIiGl-IECI? FOR, EURBGGEL.

:LATOBS.

Application filed January 14, 1927, Serial No. 161,212, and in HungaryApril 10, 1926.

l of the field magnet.

In the drawing Figure 1 shows a two-pole field magnet according to theinvention in cross section, and

Eigures 2 and 3 show two circuit diagrams oi a rotating field magnetcomprising six field coils.

According to Figure 1, the field winding consists of coils 1 6 which arewound of bare metal strips and are arranged in slots of the iron core722, with insulating layers a separating the coils from the innersurface of the slot. The coils are maintained in the slots by means ofmeta lic wedges 7) arranged so as to close the slots.

The coils 1-6 (Figure 2) are connected in multiple at their inner endsadjacent to the bottom of the slots and are connected to one common lineconductor 6, while the other ends of all the coils are in eletroconductive contact with the iron core m of the field magnet. The bodyoithe iron core or is connected to the second line conductonf.

The ahore a 'rangement allows to reduce the thickness 01? the insulationa sabstantially while no insulation necessary between the wedges b andthe outermost turn of the coils this latter can be in electrocomluctivecontact with the iron core on. Hence the transfer of heat vfrom thecoils to the iron core facilitated so that owing to the more ellicientcooling oi the coils, the load-capacity oi? the winding is considerablyincreased. Owing to the reduct on of the thiclliness and the nartialomi, 'lOIl of the insulation the space lwailable for the conductorswithin the slots is increa ed. The lack ot the outermost layer ofsnlal'ion enables the magnet to remain sn "ntiall completely operativeeven si ter a stator lire since such ire damages only the outside layeror" insn a on.

A more convenient arrangement is shown in lligure 3 in which hall? ofthe number oi coils, 3 and 1-, l, (3 respectively are connecteo multipleat their 'nner ends by intr s or a common line conductor 6 0r resperively, while the outer ends the coils are in electrocondnetire contactwith the iron core m.

Having now particularly described and asined the nature y said inventionand nor rile same to be performed,

. a; I claim is:- ting field magnet for turbo gen-- craters, iron coretwo collector rings conliiiQT-" i a olurality of slots in said of metalstrips of the ultll of the slots w ithin saidslots,i'i1etallic "'iecircumferential ogenings cure said coils in said slots, said coils oneor their cc and with one of said col- 7 d coils being by means of thelnrns substantially at the whole face of end outermost turn in metal :twith d iron core. rotating held magnet for turbo craters an iron coretwo collector rings con nected therewith, a plurality of slots in saidiron core, coils wound 0'? metal strips of the breadth of the slotswithin said 4 metaleadcr h 0 cent;

lie Vet s the circumferential onenw 111! s L d E 'o secure said coils insaid l nected in mulo one M at their one i turn the other outermostwinding of the coils bein in me at 'c contact with the erato' I nectedtherewith,

iron core, coils w li 11' ;cs closing t l rential openi; es of said,lots to secure said coils in said slots in said strips of the slo s oisaid coil? liming connected in to one o hector ring at one of eremainiir-r coils being connected in in inle a .d to the other collector'1 g at one o" ioir LI'JJRS, and all coils being by means of tl'ieoutern'iost turn in metallic contact with s id iron core.

in a t ting field magnet for turbogencraters an iron core two collectorrings connected therewith, a plurality of slots in said 1 illlil theirturns, t

iron core, coils Wound of metal strips of the breadth of the slotsWithin said slots, metaL iio Wedges closing the circumferential openingsoi saiei slots to secure said coils in said sio'zs, part of said coilsbeing connected in inuitipie and to one collector ring at one theiroutermost turns, the remaining coils being connected in multiple and tothe other coiiec iOl ring at one of their outermost turns, and ail coiisbeing by means of the other 561111051.) turn in metaiiie Contact Withsaid he coref i in testimoi'zy whereof I afi'ix my signature.

OTTO lITUS BLATHY.

